import pygame.font

class Scoreboard():
	"""显示得分信息的类"""
	def __init__(self, ai_settings, screen, stats):
		"""初始化显示得分涉及的属性"""
		self.screen = screen
		self.screen_rect = screen.get_rect()
		self.ai_settings = ai_settings
		self.stats = stats
		
		# 显示得分信息时使用的字体设置
		self.text_color = (30, 30, 30)
		self.font = pygame.font.SysFont(None, 48)
		
		#准备初始得分图像
		self.prep_score()
		
	def prep_score(self):
		"""将得分转化为图像"""
		score_str = str(self.stats.score)
		self.score_image = self.font.render(score_str, True, 
			self.text_color, self.ai_settings.bg_color)
		
		# 将得分放在屏幕右上角
		self.score_rect = self.score_image.get_rect()
		self.score_rect.right = self.screen_rect.right - 20
		self.score_rect.top = 20
		
	def show_score(self):
		"""在屏幕上显示得分"""
		self.screen.blit(self.score_image, self.score_rect)
